2. amps-preamps
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Krell KSA100 vs Threshold 400A vs McCormack DNA 0.5

HiI need a 100W amplifier to drive my Morrison speakers. I Can easily refurbish electronics if needed. Someone offered me a Krell KSA100 another one offered me a Threshold 400A I have to repair and finally a McCormack DNA 0.5 or 1 seems appealing but I dont have any I could  buy.  I hate over detailed sound and I love tube amps mids but do'n want a tube amp. As I couldn't buy a Morrison woofer if I burn it with a faulty amp. I need something bullproof. I never heard and couldn't hear any amps mentionned with my setup.  What would be your preference or do you have any other recommendations ?
Thanks
legarem

Showing 3 responses by rwwear

rwwear
2,887 posts
 
I would go with the Krell also. Another amp to consider though is a solid state Conrad Johnson if you don't mind single ended. I had one in the shop around 15 years ago and it sounded great.
rwwear
2,887 posts
 
The problem you are describing is an issue we now see frequently on the original DNA-1 and DNA-0.5 amplifiers that are now over 25 years old.

It is an issue that we no longer consider repairable. The problem is with the through-hole plating between the top and bottom of these two sided driver boards.

Repairing failed components and mending the connective traces can sometimes revive the amp for a short time but doing this is not recommended. The underlying problem is still there and it will continue to get worse.

Why would Steve offer upgrades to amps that will probably fail in the near future?
rwwear
2,887 posts
 
Good to know HiFi.
Is McCormack still in business with Conrad Johnson?
Apparently not. http://www.mccormackaudio.com/index1.html
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